<?php
/**
 *2016.8.8 作业题1
 * User: wuz
 * Date: 2016/8/8
 * Time: 13:39
 */

/*求$b的值
 * */
$empty = '';
$null  = null;
$bool  = false;
$notSet;
$array = array();
$a     = 1;
$x     = &$a;
$b     = $a++;
echo $b; //b的结果是1，$a是后加，先返回1赋值给b在自加
